List of Grounds

[lazabby]

At one point I had started a thread on a list of grounds. I thin it was under the old forum before it crashed. From the feedback on the old thread I have a list that perhaps is useful. The list may not be complete but for those wanting to clean the grounds on your car this might be useful.


List of Grounds
1. Right side of the radio / A/C metal bracket (dash). Need to remove the center console to get to them.

2. Passenger side, right behind the parcel shelf wall. Need to remove the parcel shelf wall to access them.

3. Passenger side, Ground going to one of the bolts near the Trailing arm (not the trailing arm bolt itself).

4. Passenger side, Ground strap going from the engine to a bolt on the engine mount.

5. Drivers side, grounds going to bottom bolt that holds the ignition resistor to the metal bracket.

6. Single ground going to the bolt that holds the Vacuum advance solenoid to the throttle body.

7. Front of the car - at the mounting point of each radiator support brace. On page 1-3-1 of the parts manual the brace is parts ID #1. The bolt where it attaches to the frame provides grounds for much of the front of the car (lights, horns, etc.) There are ground points on both of the braces.

8. Passenger side from the frame (directly below the jump start lug) running up to a stud in the harness box.

9. Passengers side, on the forward side of the intake manifold, with a red heat shrink & blade connector. This one comes from a harness & if unplugged causes the Lambda system to not operate correctly.

10. Drivers side, under the parcel shelf with the ECU mountings & harnesses.

11. There's a connector with about 9 terminals, one is ground, that's parked inside the washer bottle cover. But it's not technically a "ground point". But it does ground much of the dashboard area! The black cover with the bottle inside it that's held on with way too many rusty screws. You can usually pull the cable out and get to the plug without taking the cover off. Carefully pull out the grommet that's right next to the cover.

[Ron]

Nice!

That is what I had in mind here:
http://dmctalk.org/showthread.php?1301-Ground-Location-List

There are more to be found here:
http://dmctalk.org/showthread.php?1371-DeLorean-Ground-Schematic

http://dmctalk.org/showthread.php?1360-Ground-Bus


It would be great if someone familiar with them (such as yourself ;-) could pick out the ones missing and add to this.
If you want, I can move this to the first link above (in the Resources Section) and make a sticky out of it....then append new findings to it as people post them in the thread?

I think Sean's idea of pics was good too (insert them in the sticky as people have a chance to take them).

[lazabby]

Ron,
Thanks for your links. I'm not familiar with many of them. The list is from what I gathered from others. A good comprehensive list would be good.

[DMC5180]

Your List is very comprehensive and to the point. If there was a picture to go with each description, that would make the perfect resource Stinky.

[Squall67584]

I agree, a sticky with pics would be great.

[Jonathan]

At one point I had started a thread on a list of grounds. I thin it was under the old forum before it crashed. From the feedback on the old thread I have a list that perhaps is useful. The list may not be complete but for those wanting to clean the grounds on your car this might be useful.......

Here is the document I was starting to work on before I had to take a little "siesta" from the forum.

It is a work in progress and mostly copied from the other thread on this same topic.

I just removed two of the photos to make it small enough to upload onto the forum. Bill's drawing was on the last page and Photo 1 was early on.

119221192111923

[Ron]

I like the way you did it short form then expanded below in the .docx, Jonathan!

========

There is a lot of work different people have done on location lists and a buses separately floating around.

Let's collect it all and put it together!

I found these in the bit bucket:

Grounds (same as above with additions):
11926


Grounds with Bill's Bus:
11927


Grounds with Bill's Bus & Pics:
11928


11931


=====================


What do you guys think of doing it something like below (with better pics of coarse)?:

Locations:

1. Right side of the radio / A/C metal bracket (dash). .
11929

2. Passenger side, right behind the parcel shelf wall.
11930

3. Passenger side, bolts near the Trailing arm (not the trailing arm bolt itself).

...


Details:

1. Need to remove the center console...
...

2. Need to remove the parcel shelf wall...
...

[lazabby]

My ground from the battery is connected to the frame, not to the trailing arm. Someone had drilled a hole through the frame and bolted it on. They scraped away the rubber coating but not the POR-15. Obviously the ground is working but I wonder how much resistance there is in the POR-15?

[Ron]

My ground from the battery is connected to the frame, not to the trailing arm. Someone had drilled a hole through the frame and bolted it on. They scraped away the rubber coating but not the POR-15. Obviously the ground is working but I wonder how much resistance there is in the POR-15?
I'd guess it is pretty high, but the fasteners bite into each other and if it is cranking your engine, the connection is handling 100+ amps....
But then again, you can not get them too clean, and we're talking about deloreans ;-)

[lazabby]

I'd guess it is pretty high, but the fasteners bite into each other and if it is cranking your engine, the connection is handling 100+ amps....
But then again, you can not get them too clean, and we're talking about deloreans ;-)

I'm trying to make sure I connect the battery ground to the right bolt. There are two bolts on a plate holding the trailing arm to the frame. Is the cable suppose to be connected to one of those two bolts? I assume the cable needs to be next to that plate, then a washer on top of that and then the nut?

[Ron]

Yes, all I have seen are on the front bolt. I cleaned everything to bare metal and used a (hard) star washer, cable, flat...then coated everything.

[Bitsyncmaster]

If your ever adding a new ground to an existing hole or new hole in the frame, it takes a lot of pressure with a wire brush in your drill to remove the epoxy. I did add a new ground for my headlights and it was a lot of "grinding" with the wire brush.

I think you should have at least one side going to bare metal. I don't think an internal or external lock washer will cut through the epoxy.

[Ron]

I think you should have at least one side going to bare metal. I don't think an internal or external lock washer will cut through the epoxy. Agreed.
I don't use regular lock washers on exposed electrical connections if I can avoid it and prefer the internal or dual ones over external ones (they usually hang out of the squeeze). You usually don't find epoxy on the mating surfaces of the nut or washers, of coarse, but not going to bare metal everywhere here is asking for it IMO.

[lazabby]

The radiator fans are suppose to be grounded on the driver's side where the radiator bracket attaches to the frame. I cannot find it. I followed the wires from my fans all the way into the wiring bundle in the washer fluid compartment and found no place where the wires were grounded. What gives?

[Ron]

Try looking at the schematic with pics in post #7. Yours should be similar to it w/o the heavy bus cable...

[lazabby]

Try looking at the schematic with pics in post #7. Yours should be similar to it w/o the heavy bus cable...

I found it. It helps to remove the cover to the brake fluid reservoir. Very easy to access from there. Got fine sandpaper and cleaned all the contacts. Put a thin layer of Oxgard on it. I put a new cable from the ground on the battery to the bolt on the plate holding the trailing arm. Then used the old cable to connect from there to a bolt on the transmission.